Hey Z1, get your hands on a NGS mount from the now defunct Redfield. The NGS has two screws that replace two pins in the Glock, it takes about 2 mins to mount and has caused no problems that I know. I have had great success with an ESD in that mount for STC competition. We had been using a 17L and a 24C, but we just switched to a 34 and a 35.
If you can't find one, maybe I can help ya.
let me know.